Research Article

Air Ultrasonic Signal Localization with a Beamforming Microphone Array

Figure 14

Beamforming result at 75 kHz frequency calculated from the experimental data acquired with the synthetic ring array with 48 elements. Z-distance of the microphone to the screen: (a) 0.5 D; (b) 0.65 D; (c) 0.9 D.
(a)
(b)
(c)